题目
题型：不详难度：来源：
Mike Yassa is a neurobiology professor．He and other researchers wanted to know if caffeine could improve a person’s memory．He explains，“After you learn anything，it takes some time for that memory to strengthen．And over the first 24 hours is actually where most of the forgetting happens．So that is where we wanted to intervene with caffeine and see if we can help reduce this forgetting．”
They took 160 caffeine-free people and showed them pictures of everyday objects. These people were asked if the objects could be found inside the house， or outdoors．Then some of the subjects were given a caffeine pill．The others were given a placebo—a pill containing nothing. 24 hours later，the subjects were shown the exact same images from the day before．They were also shown images with slight differences，and some completely new images. Both groups correctly identified the exact same and completely new pictures．But those who took the caffeine pill were better at spottingthe pictures that were slightly different．
Professor Yassa says their answers helped to show the effects of caffeine on memory. And we find that if they are on caffeine they are much more likely to make the right decision．”
The amount of caffeine the researchers used in the study was similar to one cup of strong coffee．The researchers did not see any improvement to memory from smaller doses of caffeine or when it was given an hour before viewing the images．
小题1:What is the focus of the text?
| A．Caffeine can make people addicted． |
| B．Caffeine can make people energetic. |
| C．Caffeine can improve long—term memory． |
| D．Caffeine can make people feel comfortable． |
| A．How the experiment was conducted． |
| B．Who took part in the experiment． |
| C．Which group of subjects did better． |
| D．What was used in the experiment． |
| A．Culture． | B．Technology． | C．Health. | D．Education. |
| A．Most forgetting occurs within the first 24 hours． |
| B．Forgetting can be positively affected by caffeine． |
| C．The subjects were given different pills． |
| D．Yassa was disappointed with the result． |
| A．More caffeine means better memory． |
| B．Smaller doses of caffeine doesn’t work． |
| C．The time to take cafieine doesn’t matter． |
| D．Caffeine is taken before the experiment． |
答案
小题1:C
小题2:A
小题3:C
小题4:D
小题5:B
解析
小题1:C
【试题解析】主旨大意题。根据文章第一段最后一句This is because of caffeine，which helps to give a jump start to the nervous system．Now，a report says it may also boost long-term memory．可知本文主要讲述的是咖啡因能够有助于人们的长期记忆，叙述与此有关的实验的情况。故C正确。
小题2:A
【试题解析】推理题。根据本段2,3行Then some of the subjects were given a caffeine pill．The others were given a placebo—a pill containing nothing. 24 hours later，the subjects were shown the exact same images from the day before．可知本段是在叙述这个实验的具体流程和做法，所以本段是关于实验如何被操作的。故A正确。
小题3:C
【试题解析】推理题。本文主要讲述的是咖啡因不仅可以让我们的精神兴奋起来，而且对我们的长期记忆也是有很大的好处的，所以本文是关于健康类短文短文，也就是说C项正确。
小题4:D
【试题解析】推理题。根据倒数第二段Professor Yassa says their answers helped to show the effects of caffeine on memory. And we find that if they are on caffeine they are much more likely to make the right decision．可知他认为这个研究的结果能够反应咖啡因对人的记忆的影响，说明这个实验是有作用的。也就是说D项说法是错误的。
小题5:B
【试题解析】推理题。The researchers did not see any improvement to memory from smaller doses of caffeine or when it was given an hour before viewing the images．可知剂量较小的咖啡因对人的记忆没有太多的改善，这样的研究在实验里没有体现出来。故B正确。
【长难句解析】
Many people cannot start their day without first having a cup of coffee or tea。
【翻译】如果没有一杯咖啡或者一杯茶，很多人都无法开始一天的工作。
【分析】本句中的介词without如果没有…；表示上下文的条件，相当于一个条件状语从句：if they don’t have a cup of coffee or tea.
核心考点
试题【Many people cannot start their day without first having a cup of coffee or tea．T】；主要考察你对题材分类等知识点的理解。[详细]
举一反三
The designer, Anthony Herrera, just recently released his 2013 collection. "The Star Wars snowflake designs began as just doing designs of characters that I and my daughter wanted to make three years ago," Herrera told us in an email. "The second year I introduced vehicles, and this year I decided to push further by designing battle scenes."
Sometimes, he feels a bit bored with his job. With each year, the designs have got more detailed and various, but the process of creating them remained the same: sketching figures on paper with a pencil until a symmetrical (对称）pattern comes out, then scanning the designs and cut them with scissors. However, he says he has plenty of ideas for new flakes next year, so no two will ever be the same. Hopefully with Star Wars: Episode VII coming in 2015 he"ll have even more work in the future.
Check out your favorite finished versions of Herrera’s flakes (from both 2013 and previous years) and download the pictures beneath them and then get down to creating your own work. A warning: Most designs aren"t for the casual flake-maker, so patience you must have.
小题1: Making paper snowflakes draws many people"s attention probably because ______.
| A．it is a traditional form of decoration | B．it is a course of artwork in school |
| C．it is a way of killing time in holiday | D．it is designed by Anthony Herrera |
| A．can make snowflakes with his daughter"s help |
| B．made more complicated designs before 2013 |
| C．introduced paper vehicles in 2011 |
| D．will make a great variety of detailed paper flakes |
| A．he has to design detailed and different patterns |
| B．he has to follow the fixed process of paper cutting |
| C．he spends much time designing, scanning and cutting |
| D．he has few ideas for what the next designs will be like |
| A．offer us more information about Herrera’s paper cutting |
| B．tell us how to download picture of snowflakes |
| C．instruct people to be a real creative artist |
| D．remind us of being patient with Herrera’s designs |
The city was essentially shut down after PM2. 5, fine Particulate(微粒物) pollution that is considered hazardous(有害的) . reached levels of 1000 micrograms per cubic meter-40 times the safety level remended by the World Health Organization. Schools, motorways and an airport were closed on Tuesday as visibility in some areas of the city dropped to less than 10 meters.
Photos from Harbin showed residents covering their mouths with masks and scarves, and moving like ghostly shadows through the fog. Cars and motorcycles are moving slowly as traffic came to a standstill with traffic lights barely visible. .
Just days previously , the World Health Organization"s International Agency for Research on Cancer (IARC) classified air pollution as a carcinogen(致癌物) . It stated that there is " sufficient evidence" that exposure to outdoor air pollution causes lung cancer and also linked it with an increased risk of bladder cancer. It"s said that exposure has increased significantly particularly in " rapidly industrial countries with large populations".
"The air we breathe has become polluted with a mixture of cancer-causing substances" , Dr Kurt Straif , head of the IARC said in a press released. "We now know that outdoor air pollution is not only a major risk to health in general, but also a leading environmental cause of cancer deaths. "
On the Chinese social media site Weibo , many users complained about the pollution and shared their concerns. References to "feed people with smog "have become popular on Weibo and there is a sarcastic play on the expression "serve the people" , as the two have a similar pronunciation.
"The impact of air pollution on people will be gradual. There won"t be a sudden outbreak of symptoms, but normally three to five days after the smoggy weather occurs, there is a peak in the number of people seeing doctors, " Deng Ying, a doctor at the Second Affiliated Hospital of Harbin Medical University was quoted as saying.
小题1: As thick smog has become a common scene in Harbin, ______
| A．students there can go to school as usual |
| B．residents in the city can see as far as 20 meters |
| C．traffic lights can be easily visible |
| D．the urban traffic has been seriously influenced |
| A．Cancer of stomach | B．Breast cancer | C．Bladder cancer | D．Ovarian cancer |
| A． the effect of the. smoggy weather is gradual |
| B． air pollution is the man environmental cause, of cancer deaths |
| C．exposure has greatly increased in countries with large populations |
| D．"feed people with smog" has bee a hot word |
| A．awaken people"s environmental awareness |
| B．warn people not to go out in smoggy weather |
| C．call for the public to wear their masks |
| D．advise people not to live in Harbin |
There could hardly be a better time for them to prove their importance. The streets were left a mess after hundreds of carnival parades and now, rubbish pries up in both poor and uptown neighbourhoods and in tourist areas like Ipanema or Copacabana beach.
The president of Rio"s rubbish collecting company has even appealed to the population to store rubbish at home whenever possible. He says 30% of the city"s sweepers have gone on strike. Some of those who have been working have been threatened by the strike movement so now the police has been deployed alongside rubbish collectors to keep them sage as they go about their business.
The strike has divided opinions in Rio. On social media, many support the sweepers" demands for better salaries. Others say they are opportunists and the situation is a big embarrassment to the city.
But Brazil"s culture of littering the streets doesn"t help. A video that went viral online shows that even authorities have a problem with that. Rio"s mayor, Eduardo Paes, is seen throwing what seemed to be the rest of an apple on the sidewalk--and now promised to impose himself a fine for his wrongdoing. His government recently created a programme to keep Rio"s residents from littering the streets.
小题1:Rio"s street cleaners go on strike to
| A．prove their importance | B．threaten the government |
| C．ask for higher salaries | D．appeal to the public not to litter |
| A．the police are called out to put down the riot | B．the police are required to protect some cleaners |
| C．the police are to collect rubbish for the time being | D．the police are sent to arrest people who litter around |
| A．hopeless | B．approving | C．critical | D．optimistic |
| A．criticize, street sweepers of Rio for misusing their rights |
| B．call attention to the embarrassing situation of Rio |
| C．describe the effect or the strike on people |
| D．inform people of the present situation of Rio |
What is the first thing you nitice when you walk into a shop? The products displayed (展示) at the entrance? Or the soft background music?
But have you ever notice the smell? Unless it is bad, the answer is likely to be no. But while a shop’s scent may not be outstanding compared with sightsand sounds, it is certainly there. And it is providing to be an increasing powerful tool in encouraging people to purchase.
A brand store has become famous for its distinctive scent which floats through the fairly dark hall and out to the entrance, via scent machines. A smell may be attractive but it may not just be used for freshening air. One sports goods company once reported that when it first introduced scent into its stores, customers’ intension to purchase increased by 80 percent.
When it comes to the best shopping streets in Pairs, scent is just as important to a brand’s success as the quality of its window displays and goods on slaes. That is mainly because shopping is a very different experience to what it used to be.
Some years ago,the focus for brand name shopping was on a few people with sales assistants’ disproving attitude and don’t-touch-what-you-can’t-afford displays. Now the rise of electronic commerce (e-commerce) has opened up famous brands to a wider audience. But while e-shops can use sights and sounds, only bricks-and-mortar stores (实体店) can offer a full experience from the minute customers step through the door to the moment they leave. Another brand store seeks to be much more than a shop, but rather a destination. And scent is just one way to achieve this.
Now a famous store uses complex man-made smell to make sure that the soft scent of baby powder floats through the kid department, and coconut (椰子) scent in the swimsuit section. A department store has even opened a new lab, inviting customers on a journey into the store’s windows to smell books, pots and drawers, in search of their perfect scent.
小题1:According to the passage, what is an increasingly powerful tool in the success of some brand store?
| A．Friendly assistant. | B．Unique scents. |
| C．Soft background music | D．attractive window display. |
| A．ashow the advantages of brick-and-mortar stores |
| B．urge shop assistants to change their attitude |
| C．push stores to use sights and sounds |
| D．introduce the rise of e-commerce |
| A．a platform that exhibts goods |
| B．a spot where travelers like to stay |
| C．a place where customers love to go |
| D．a target that a store expects to meet |
| A．compare and evaluate | B．examine and assess |
| C．argue and discuss | D．inform and explain |
But what began as nothing important in public affairs has grown into a social movement .Business people,political leaders, university professors,and especially millions of grass-roots Americans are taking part in the movement. “The understanding has increased many ,many times,”says Gaylord Nelson,the fromer govermor from Wisconsin,who thought up the first According to US government reports , emissions (排放)from cars and trucks have dropped from 10.3 million tons a year to 5.5 tons .The number of cities producing CO beyond the standard has been reduced from 40 to 9 .Although serious problems still remain and need to be dealt with , the world is a safer and healthier place .A kind of “Green thinking ” has become part of practices .
Great improvement has been achieved .In 1988 there were only 600 recycling programs ,; today in 1995 there are about 6,600 .Advanced lights ,motors , and building designs have helped save a lot of energy and therefore prevented pollution .
Twenty –five years ago , there were hardly any education programs for environment .Today , it’s hard to find a public school , university , or law school that does not have such a kind of program .” Until we do that , nothing else will change! ” say Bruce Anderson .
小题1:According to Anderson , before 1970, Americans had little idea about ___
| A．the social movement |
| B．recycling techniques |
| C．environmental problems |
| D．the importance of Earth Day |
| A．The grass –roots level |
| B．The business circle |
| C．Government officials |
| D．University professors |
| A．They have cut car emissions to the lowest |
| B．They have settled their environmental problems |
| C．They have lowered their CO levels in forty cities. |
| D．They have reduced pollution through effective measures . |
| A．Education |
| B．Planning |
| C．Green living |
| D．CO reduction |
最新试题
- 12004年十届全国人大二次会议决定将“尊重和保障人权”写入宪法，2012年十一届全国人大五次会议又决定将“尊重和保障人权
- 2补全对话。假期过后，刚刚返校的Louisa遇到了Josie，她们在一起谈论自己假期都做了什么。Louisa: 1. __
- 3动物运动的方式多种多样，动物运动所消耗的能量主要来自（ ）A．肌细胞内有机物的分解B．肌细胞内含有的无机盐C．肌细胞内
- 4如果三角形有两条边的垂直平分线的交点恰是第三条边的中点，那么这个三角形是______三角形．
- 5实验室制取CO2一般有以下几个步骤：①向长颈漏斗中注入稀盐酸；②向容器放入几小块石灰石；③按要求组装仪器；④检查装置的气
- 6关于三类产业的叙述，正确的是[ ]A．经济落后的国家以第三产业为主B．经济发达国家大多数第一产业的比重很小C．交
- 7从地面竖直上抛一物体，上升过程先后经过A、B两点，它两次经过A点的时间间隔为tA，两次经过B点的时间间隔为tB，不计空气
- 8激素在人体内的含量极低。 [ ]
- 9请你利用下列材料用具，设计一个实验，探究酒精对水蚤心率的影响。 (1)材料用具：活水蚤、蒸馏水、体积分数为95%的酒精、
- 10【题文】下列秦始皇的举措，旨在巩固国家统一并顺应时代发展的是①“兼并天下”“设置郡县”
热门考点
- 1关于物体的密度，以下说法正确的是 （ ）A．由公式ρ=m/V可知，物体的密度跟质量成正比，跟体积成反比B．密度是物体
- 2【题文】依次填入下列各句横线处的词语，最恰当的一组是
- 3如图乙所示，用起子开启瓶盖，请确定支点Ｏ的位置，画出力F的力臂。
- 4黑龙江省是我国主要的粮食产区，下图是某生产基地种植的玉米。请回答下列问题：(1)玉米为人类提供的营养素主要是______
- 5叶绿体和线粒体都是重要的细胞器，下列叙述中正确的是[ ]A．两者都具有能量转换功能B．两者都有双层膜结构C．两者
- 619世纪中期的一位英国记者报道:“没有一个曼彻斯特的工人没有钟表，这是他们必须不可离开的东西……(他们)最通常的物品是那
- 7由于候鸟的迁徙。“禽流感”在部分国家和地区出现新一轮的爆发。从烹调香料八角中提取到的莽草酸是制取抗禽流感药物达菲的基本原
- 8【题文】读“四幅地貌景观图”，回答下题。A．①是岩浆岩，在陆地表面分布最为广泛B．②景观是风化作用的结果C．③景观中的岩
- 9为了推动群众性爱国主义教育活动的深入开展，中宣部、中组部等11个部门联合组织了“双百”人物的评选活动。2009年9月10
- 10Much to our relief，his disease turned out to be ________ tha